Homebrew PCBs

I haven’t etched my first board, yet (getting asymptotically closer;  
maybe this week if I can get my toner sorted) so I’m watching this  
with extreme interest. :-)

On Jan 4, 2010, at 2:59 AM, jimofc300 wrote:

> 5)  Would Krylon spray clear coating and/or spray paint work as a  
> solder mask? My thought is to spray the board immediately after  
> etching and touch-up. Then, I would assume, soldering would burn off  
> the paint instantly. Would a second coat be necessary after assembly?

I bought a container of MG Chemical’s “Liquid Tin”, Mouser part number  
590-421-500ML.  Once the board’s etched, you just swish it around in  
some of this stuff and it tins the remaining copper.  It’s supposed to  
prevent oxidation, but it is not a solder mask.  Mine came with a good  
amount of precipitate on the bottom; anyone know if that’s normal?

--
Brian Lalor
blalor@bravo5.org